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I R; CAMPBELL.

(N0 Model.)

PAVING BLOCK. l

Patented Apr.,1, 1884.

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PATENT OFFICE.

ROBERT CAMPBELL, OE WHEELING, WEST VIRGINIA, ASSIGNOR TO'IM- I SELF AND GEORGE RAIRD, OF SAME PLAGE, NEW OUMRERLAND, WEST vIReINIA.

ANDIJOHN PORTER, OF

PAVING-BLOCK.

SPECIFICATION forming` part of Letters Patent No; 296,131, dated April 1, 18814. Application led December 5, 1883. (No model.)

To a/ZZ whom it may concern Be it known that I, ROBERT CAMPBELL, of Vheeling, in the county of Ohio and State of Vest Virginia, have invented a new and use- `ful Improvement in Paving-Blocks; and I do hereby declare the following to be a full, clear, and exact description thereof. I

My invention relates to an improvementin paving streets; and it consists in a pavement composed of fire-brick blocks arranged on a propelly-prepared foundation, the spaces between the blocks being filled with` asphaltum `or cement, whereby a much more durable and stronger pavement can be obtained than by I 5 the use of composition blocks, wood, or ordiv nary brick, and one which,while it approaches stone blocks in durability, is much lighter, `cheaper, and more elastic than stone, all of which is material in the construction of pave- 2O ments, especially those over which heavyloads pass. n

I will now describe my invention,so that others Skilled in the art may employ the same, reference being had to the accompanying drawings, forming part of this specification, in whichm I Figure l is a vertical sectional view ol' my improved pavement,and Fig. 2 is a perspective view of the paving-blocks.

Like letters of reference indicate like parts wherever they occur.

A I mold or otherwise form the brick from what is known as lire-brick clay, and burn or bake them in the usual manner, when it will be foundthat bricks formed from this material are much more durable than the oommon red brick, being harder and capable of Standing a much greater pressure.

The advantages of using brickinstead of stone 4o `are that it is not only cheaper, but it is at the same time lighter and more elastic than stone, and does not become smooth and Slippery, while the `fire-brick employed by me is of Sufcient strength and hardness.

The preferred form of brick is that shown at ain the drawingsfthat is to say, oblong in shape and having beveled sides b, so that the base c is greater in area than the upper surface, d In forming the pavements from these blocks, they are placed on their base side by side, the ends overlapping each other, as shown in the drawings, on a suitable curved bed or foundation, i, which is composed of sand, gravel, cinder, cement, or other suitable material. When the blocks are laid in this manner,the` edges around the base meet each other, while, owing to the beveled sides, between the blocks at their upper surface is an interstice or space, h. This Space is then filled vwith asphaltum or cement in alioluid` form, or with other suitable material.

The advantages of my improved pavement are that the blocks, when formed of fire-brick, are lighter, cheaper, and more elastic than stone, while at the Same time they are more durable than wood, common brick, or composition blocks, and, being all ofthe same shape and size, fit closely together, and are easily replaced when broken or displaced without injury or the removal of the surrounding blocks.

I do not claim, broadly, a truncated wedgeshaped paving-block, or `a pavement composed of such blocks, the spaces between the Same being illed with asphaltum or cement; but, n

Having thus described my invention,what IA claim, and desire to secure by Letters Patent, Is-

A `pavement composed of a series of re-clay blocks and an interposed binder of asphaltum or cement, substantially as and for the purposes Specied.

In testimony whereof I have hereunto set my hand this 28th day of November, A. D..1'883.

ROBERT CAMPBELL. Witnesses:

GEO. B. CALDWELL, ALFRED CALDWELL, 

